One-shot anonymous unselfishness in economic games is commonly explained by social
preferences, which assume that people care about the monetary pay-offs of others …

Ingroup favoritism—the tendency to favor members of one's own group over those in other
groups—is well documented, but the mechanisms driving this behavior are not well …

A forceful argument against America's vicious circle of growing inequality by the Nobel Prize–
winning economist. The top 1 percent of Americans control 40 percent of the nation's wealth …

We review the literature on models that try to explain human behavior in social interactions
described by normal-form games with monetary payoffs. We start by covering social and …

Take-it or leave-it offers are probably as old as mankind. Our objective here is, first, to
provide a, probably subjectively colored, recollection of the initial ultimatum game …

Departures from self-interest in economic experiments have recently inspired models of
“social preferences.” We design a range of simple experimental games that test these …

This paper shows that reciprocity has powerful implications for many economic domains. It is
an important determinant in the enforcement of contracts and social norms and enhances …

People are reciprocal if they reward kind actions and punish unkind ones. In this paper we
present a formal theory of reciprocity. It takes into account that people evaluate the kindness …

This paper explores whether generosity in experiments is truly evidence of concern for
desirable social outcomes. We conduct an experiment using a binary version of the dictator …

During the evolution of cooperation it may have become critical for individuals to compare
their own efforts and pay-offs with those of others. Negative reactions may occur when …